/Engine/Plugins/Runtime/RigVM/Source/RigVMDeveloper/Public/EdGraph/RigVMEdGraphNode.h
Note that the object will be modified. If we are currently recording into the transaction buffer (undo/redo), save a copy of this object into the buffer and marks the package as needing to be saved.
true if the object was saved to the transaction buffer
virtual bool Modify ( bool bAlwaysMarkDirty )